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Binary compound. A binary compound is a chemical compound that contains exactly two different elements. Examples of binary ionic compounds include calcium chloride (CaCl2), sodium fluoride (NaF), and magnesium oxide (MgO), whilst examples of binary covalent compounds include water (H2O), and sulfur hexafluoride (SF6)
Classifying compounds as ionic or covalent. Compounds containing two elements (so called binary compounds) can either have ionic or covalent bonding. 1  If a compound is made from a metal and a non-metal, its bonding will be ionic.2  If a compound is made from two non-metals, its bonding will be covalent.o decide if a binary compound has ionic or covalent bonding, first locate the two elements concerned in the Periodic Table and decide if they are metals (shown in blue) or non-metals (shown in pink).